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14 .\" This product includes software developed by the University of
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20 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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32 .\" From: @(#)err.3 8.1 (Berkeley) 6/9/93
33 .\" $FreeBSD: src/lib/libc/gen/err.3,v 1.11.2.5 2001/08/17 15:42:32 ru Exp $
35 .\" 2007-12-08, mtk, Converted from mdoc to man macros
37 .TH ERR 3 2007-12-28 "Linux" "Linux Programmer's Manual"
39 err, verr, errx, verrx, warn, vwarn, warnx, vwarnx \- formatted error messages
44 .BI "void err(int " eval ", const char *" fmt ", ...);"
46 .BI "void errx(int " eval ", const char *" fmt ", ...);"
48 .BI "void warn(const char *" fmt ", ...);"
50 .BI "void warnx(const char *" fmt ", ...);"
52 .B #include <stdarg.h>
54 .BI "void verr(int " eval ", const char *" fmt ", va_list " args );
56 .BI "void verrx(int " eval ", const char *" fmt ", va_list " args );
58 .BI "void vwarn(const char *" fmt ", va_list " args );
60 .BI "void vwarnx(const char *" fmt ", va_list " args );
67 family of functions display a formatted error message on the standard
69 In all cases, the last component of the program name, a colon character,
70 and a space are output.
73 argument is not NULL, the
75 formatted error message is output.
76 The output is terminated by a newline character.
84 functions append an error message obtained from
86 based on a code or the global variable
88 preceded by another colon and space unless the
99 functions use the global variable
101 to look up the error message.
107 functions do not append an error message.
115 functions do not return, but exit with the value of the argument
120 information string and exit:
124 if ((p = malloc(size)) == NULL)
126 if ((fd = open(file_name, O_RDONLY, 0)) == \-1)
127 err(1, "%s", file_name);
131 Display an error message and exit:
135 if (tm.tm_hour < START_TIME)
136 errx(1, "too early, wait until %s", start_time_string);
144 if ((fd = open(raw_device, O_RDONLY, 0)) == \-1)
145 warnx("%s: %s: trying the block device",
146 raw_device, strerror(errno));
147 if ((fd = open(block_device, O_RDONLY, 0)) == \-1)
148 err(1, "%s", block_device);
152 These functions are nonstandard BSD extensions.
158 .\" functions first appeared in